Question

what is the nature of charge on a test conductor which when touched to the brass disc of a positively charged electroscope results in a divergence of the metallic leaves?​

Answer 1

When the body touches the electroscope, its charges are transferred to the leaves. There is a decrease in repulsion which happens due to decrease in the same kind of charge or increase in opposite kind of charge, and hence, this indicates that the body is negatively charged.